Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c50e79cc9439c47…

MALICIOUS

PDF

35.9 KB Created: 2020-10-29 14:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6dad1f066683c50196b483d071ffcf1b SHA-1: 241d7c9b4153a6feb1400e2b2a934fbb7311740a SHA-256: 6c50e79cc9439c4716d1f066262ee855cbb4e0c87f030978152c78960cbd81e1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/aws?keyword=to%2527hajiilee+community+school+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f90d9a1a5e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_5f8f2a077eb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_5f9313bb4b597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c092ffea-0ad8-4904-9478-ef63279934e1/besolisaxabawugedipu.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/kilugedalitoraginel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1605/5715/files/alcast_maelstrom_arena_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9694/1755/files/24240978916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/wapking_.bhojpuri_movie_song_all.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/46706427884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6227fd8b-a8c9-40b0-9f9d-1f9ca4f137d8/managerial_economics_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29669a0e-3955-4cf6-9125-3cc5a06ac414/89961062486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/ffxiv_leveling_guide_miner.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/wbfs_manager_download_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9deca342-fd4d-474c-9ca1-e5d5b3b0547c/ceeport_cleaning_card.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4508 5476 bytes
SHA-256: 854b90b9f4c8e6bdcbeb08f930683375322b6d844f907638971882755ed455f0
font_01_sfnt_off00005789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5789 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off000062eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 9152 bytes
SHA-256: 78cb799bef9257588ceaf42f795a69e7d142501afdb3fb29e3571baeeab773a2

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